What SSD was it? There are a lot of variability in terms of SSD performance.
1. Is it a new vs old SSD? Old SSDs can become slower if they’re really worn out 2. was the office SSD near capacity holding other data? 3. what models were they? SSD != SSD… there is a massive amount of performance variability out there. … also … more data is needed. JDK versions the same? cassandra versions the same? what about the config? On Fri, Sep 26, 2014 at 2:39 PM, Shing Hing Man <mat...@yahoo.com> wrote: > Hi, > I have run cassandra-stress write and cassandra-stress read on my > office PC and on my home PC. > > Office PC : Intel Core i7-4479, 8 virtual core, 16G RAM, 500G SSD Home PC > : Intel Xeon E3-1230V3, 8 virtual core, 8G RAM, 500G SATA disk. > > From the cassandra-stress result (please see below), it seems Cassandra is > more > than 100% performant on my home PC than the office PC. I am expecting the > other way around, as my office PC has much better hardware. > > Office : Intel Core i7-4479, 9 virtual cores, 16G RAM, 500G SSD > cauchy:~/installed/cassandra/tools/bin> ./cassandra-stress write > Running with 8 threadCount > Results: > op rate : 11264 > partition rate : 11264 > row rate : 11264 > latency mean : 0.7 > latency median : 0.4 > latency 95th percentile : 0.9 > latency 99th percentile : 1.6 > latency 99.9th percentile : 5.3 > latency max : 325.3 > Total operation time : 00:02:40 > > > cauchy:~/installed/cassandra/tools/bin> ./cassandra-stress read > Running with 8 threadCount > Results: > op rate : 13702 > partition rate : 13702 > row rate : 13702 > latency mean : 0.5 > latency median : 0.5 > latency 95th percentile : 0.8 > latency 99th percentile : 1.4 > latency 99.9th percentile : 3.4 > latency max : 67.1 > Total operation time : 00:00:30 > > --------------------------------------------------- > -------------------------------------------------- > Home : Intel Xeon E3-1230V3, 8 virtual core, 8G RAM, 500G SATA disk. > > matmsh@gauss:~/installed/cassandra/tools/bin> ./cassandra-stress write > Running with 8 threadCount > > Results: > op rate : 25181 > partition rate : 25181 > row rate : 25181 > latency mean : 0.3 > latency median : 0.2 > latency 95th percentile : 0.3 > latency 99th percentile : 0.5 > latency 99.9th percentile : 16.7 > latency max : 331.0 > Total operation time : 00:03:24 > > gauss:~/installed/cassandra/tools/bin> ./cassandra-stress read > Results: > op rate : 35338 > partition rate : 35338 > row rate : 35338 > latency mean : 0.2 > latency median : 0.2 > latency 95th percentile : 0.3 > latency 99th percentile : 0.4 > latency 99.9th percentile : 1.1 > latency max : 17.7 > Total operation time : 00:00:30 > > > Is the above result expected ? > Thanks in advance for any suggestions ! > > Shing > > > -- Founder/CEO Spinn3r.com Location: *San Francisco, CA* blog: http://burtonator.wordpress.com … or check out my Google+ profile <https://plus.google.com/102718274791889610666/posts> <http://spinn3r.com>
